1xRTT is just not all that great for shoutcast stream access, but 3G EV-DO is superb for that purpose, and when EV-DO Revision A hits the subs you will be amazed at some of the new capabilities that it will enable.
There are no bit usage limitations on 1xRTT at all, however, some providers do place an invisible red line on EV-DO downstream bit usage of around 10 Gb / Month (in North America) and its likely to be less overseas. Its pretty tough to use anything close to 10 Gb / month from shoutcast stream access alone.
Neither 1xRTT nor EV-DO will provide enough upstream bandwidth to permit broadcasting a usable stream to the internet. EV-DO Revision A will likely remove that barrier.
One thing you may want to check into is a hardware system specifically designed for in-vehicle use that will provide an always-on EV-DO broadband connection to the internet. One such device that we offer, called the VN1 Server
, has all of the advantages of an onboard EV-DO connected PC and includes a WiFi access point that other devices in and around your vehicle can connect to for internet access.
The VN1's 802.11g 54 Mbps access point has an effective open air connection range of around 1000 ft. This means you can typically receive the signal that your vehicle out in the parking lot is broadcasting from within a mall or grocery store. I use a WiFi equiped Pocket PC with a set of stereo earbuds attached for that purpose.
When you are near a suitable public WiFi access point, the VN1 will automatically connect to the access point and serve its internet connection from your system, so you really dont need to worry about any potential EV-DO bit usage limitations even if your are a download addict like me.
I have the VN1 with a 7" Motorized In-Dash Touch Screen LCD and a dash mounted camera in my personal vehicle. I can make free VOIP "video" calls from within my vehicle anytime I am near a public WiFi access point.
Once EV-DO Revision A is offered in my area I won't need to find an open access point to place a video call from my car, as the upstream bandwidth will be more than enough to meet the considerable demands of a VOIP video call.
EV-DO Revision A offers peak theoretical data transfer speeds of 3.1 Mbps downstream and 1.8 Mbps upstream, with latency comparable to a cable modem.